题目

—I saw Mr.White in his office just now. —No，it ______ be him.He has ______ Beijing and will come back next Friday. A．mustn't；gone to  B．can't；gone to  C．can't；been to 答案：B一个小数的小数点向右移动一位后，所得的数比原数大2.7，那么这个数应该是 ．